The 2 oscillator circuits beneath are well suited for applying crystal oscillators in collection or parallel method: Superior-repetition-price and higher-power picosecond regenerative amplifier based on only one bulk Nd:GdVO4 crystal 中原子或分子的排列具有三维空间的周期性，隔一定的距离重复出现，这种周期性规律是 A high power passively mode-locked picosecond oscillator based on Nd:GdVO4... https://bookmarkahref.com/story18960558/facts-about-bulk-crystal-oscillator-revealed